Celluloid insulation



M. D. SWEET.

CELLULOID INSULATION.

APPLICATION FILED JUNE 28. 1919.

1 ,339,835, Patented May 11, 1920.

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6 [L9 9 :9 6 %i) attozmu s MEACHEM D. SWEET,

OF ALLIANCE, OHIO.

CELLULOID INSULATION.

Application filed June 28,

To all whom it may concern:

Be it known that I, MEACHEM D. SWEET, a citizen of the United States, residing at Alliance, in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Celluloid Insulators, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in insulators for batteries, and more part1cu larly to a celluloid insulation for a battery.

The object of the invention is the construction of a novel insulator that will greatly reduce the inefiicient action of the battery by reason of the extreme lower corners of the plates being short circuited as a result of these plates at the lower corners buckling.

\Vith this and other objects is View, my invention comprises certain novel constructions, combinations, and arrangements of parts as will be hereinafter specifically described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a plan view of the plates, separators, and insulators in an assembled position.

Fig. 2 is a fragmentary, vertical, sectional view of a battery having my insulators assembled therewith.

Fig. 3 is a view in side elevation of my insulator on a negative plate.

Fig. 4 is a perspective view of one of the insulators, while Fig. 5 is a plan view of the blank prior to the same being folded for producing the finished insulator.

Referring to the drawings by numerals, l designates the cell of the battery which is provided with the usual supporting lugs 2 on its base.

My insulator is placed upon the bottom of the negative plates 3, and the positive plates 4 are separated from the negative plates by means of the wood separators 5.

The insulator is preferably formed from a celluloid sheet, and may be cut by automatic machinery; this insulator comprises sides 6 connected by the short, central, or bottom portions 7, and elongated slots or Specification of Letters Patent.

Patented May 11, 1920. 1919. Serial m. 807,280.

openings 8 are formed between these por-- tions 7. The blank (Fig. 5) is folded along the lines 9 and the sides 6 are folded par allel, the sides having at their ends upwardly extending ears 6; these ears 6 are produced at the ends for affording a greater amount of insulation just at the point desired, for it will be understood that my insulator is to prevent short circuits due to buckled plates cutting through the wood separators 5. The short circuiting invariably occurs at the extreme lower corners of the plates, and by equipping thenegative plates with peculiarly-constructed celluloid lnsulators or insulation, herein described, the trouble is largely overcome or materially reduced.

My insulators do not in any manner interfere with the circulation of the electrolyte, and being attached to the negative plates, these insulators will not keep sediment from falling to the bottom of the jar or cell.

I have found from experience that, without the use of my insulators or insulation, the first trouble occurring in storage batteries is due to the positive plates buckling at right angles at the extreme lower corners, and, therefore, the advantage of having comparatively long ears 6 for increasing the area or insulation surface; further, my insulator reinforces the entire structure, by reason of the width of the ends at the point where most wear takes place. It also possesses the additional feature of insulating the plate rests or lugs 2 of rubber jars,

from the negative plates, allowing the faces of these plates to be made broader, Which would not be practical otherwise on account of the sediment lodging on these rests or lugs 2 and causing short circuits between the plates.

My insulator is made longer than the plates to insure perfect insulation in the event the insulator should move lengthw1se.

It will be understood that the two central bottom portions 7 rest upon and completely cover, as a cap, the top or flat upper faces of the rests or lugs 2.

I wish it to be understood that I reserve the right to make such minor alterations and modifications in the construction of my insulator as shall appear to one skilled in the art to which this invention relates, which changes or alterations shall fairly fall within the scope of the appended claims.

hat l claim is:

1. In a battery, the COHllrlIlflth'Hl with a cell or jar having rests on its bottom, or a plate positioned in said and above said rests, an insulator having openings in its bottom and interposed between said plate and said rests, and said insulator extending the Width of the jar and having portions covering the top of the rests.

2. In a battery, the combination with a jar provided with rests, of an insulator extending the Width of the jar and having portions resting upon the top of the rests and overhanging the same, said insulator provided with openings in its bottom and with enlarged open ends, and a plate resting in the insulator and being of less length than the insulator.

In testimony whereof I hereunto affix my signature.

'MEACHEM D. SlVEET. 

